Terminal velocity of a copper ball of radius 2 mm through a tank of oil at 20^(@)C is 6.0 cm/s. Compare coefficient of viscosity of oil. Given p_(cu) = 8.9 xx103 kg//m^(3), rho_(oil) = 1.5 xx 103 kg//m^(3).

Terminal velocity of a copper ball of radius 2 mm through a tank of oi

1.	Terminal velocity of a copper ball of radius 2 mm through a tank of oil at 20^(@)C is 6.0 cm/s. Compare coefficient of viscosity of oil. Given p_(cu) = 8.9 xx103 kg//m^(3), rho_(oil) = 1.5 xx 103 kg//m^(3).
Answer» <html><body><p></p>Solution :`nu_(t)=(<a href="https://interviewquestions.tuteehub.com/tag/2-283658" style="font-weight:bold;" target="_blank" title="Click to know more about 2">2</a>)/(9)[(<a href="https://interviewquestions.tuteehub.com/tag/g-1003017" style="font-weight:bold;" target="_blank" title="Click to know more about G">G</a>(sigma-rho)r^(2))/(eta)]` <br/> `eta=(2)/(9)[(9.8xx(8.9xx10^(3)-1.5xx10^(3))(<a href="https://interviewquestions.tuteehub.com/tag/2xx10-1840192" style="font-weight:bold;" target="_blank" title="Click to know more about 2XX10">2XX10</a>^(3))(2xx10^(-3))^(2))/(6xx10^(-2))]` <br/> `=1.08kgm^(-1)s^(-1)`</body></html>